lighttpd2/src/main/plugin_core.c

#include <lighttpd/base.h>
#include <lighttpd/plugin_core.h>

#include <lighttpd/version.h>

#include <lighttpd/http_range_parser.h>

#include <sys/stat.h>
#include <fcntl.h>

#include <sched.h>

static liAction* core_list(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	liAction *a;
	guint i;
	UNUSED(wrk); UNUSED(p); UNUSED(userdata);

	if (!val) {
		ERROR(srv, "%s", "need parameter");
		return NULL;
	}

	if (val->type == LI_VALUE_ACTION) {
		a = val->data.val_action.action;
		li_action_acquire(a);
		return a;
	}

	if (val->type != LI_VALUE_LIST) {
		ERROR(srv, "expected list, got %s", li_value_type_string(val->type));
		return NULL;
	}

	a = li_action_new_list();
	for (i = 0; i < val->data.list->len; i++) {
		liValue *oa = g_array_index(val->data.list, liValue*, i);
		if (oa->type != LI_VALUE_ACTION) {
			ERROR(srv, "expected action at entry %u of list, got %s", i, li_value_type_string(oa->type));
			li_action_release(srv, a);
			return NULL;
		}
		assert(srv == oa->data.val_action.srv);
		li_action_acquire(oa->data.val_action.action);
		g_array_append_val(a->data.list, oa->data.val_action.action);
	}
	return a;
}

static liAction* core_when(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	liValue *val_cond, *val_act, *val_act_else;
	liAction *a, *act = NULL, *act_else = NULL;
	UNUSED(wrk); UNUSED(p); UNUSED(userdata);

	if (!val) {
		ERROR(srv, "%s", "need parameter");
		return NULL;
	}
	if (val->type != LI_VALUE_LIST) {
		ERROR(srv, "expected list, got %s", li_value_type_string(val->type));
		return NULL;
	}
	if (val->data.list->len == 2) {
		val_act_else = NULL;
		act_else = NULL;
	} else if (val->data.list->len == 3) {
		val_act_else = g_array_index(val->data.list, liValue*, 2);
	} else {
		ERROR(srv, "expected list with length 2 or 3, has length %u", val->data.list->len);
		return NULL;
	}
	val_cond = g_array_index(val->data.list, liValue*, 0);
	val_act = g_array_index(val->data.list, liValue*, 1);

	if (NULL == val_cond || val_cond->type != LI_VALUE_CONDITION) {
		ERROR(srv, "expected condition as first parameter, got %s", li_value_type_string(val_cond->type));
		return NULL;
	}
	if (NULL == val_act || val_act->type == LI_VALUE_NONE) {
		act = NULL;
	} else if (val_act->type == LI_VALUE_ACTION) {
		act = val_act->data.val_action.action;
	} else {
		ERROR(srv, "expected action as second parameter, got %s", li_value_type_string(val_act->type));
		return NULL;
	}
	if (NULL != val_act_else) {
		if (val_act_else->type == LI_VALUE_NONE) {
			act_else = NULL;
		} else if (val_act_else->type == LI_VALUE_ACTION) {
			act_else = val_act_else->data.val_action.action;
		} else {
			ERROR(srv, "expected action as third parameter, got %s", li_value_type_string(val_act_else->type));
			return NULL;
		}
	}
	li_condition_acquire(val_cond->data.val_cond.cond);
	if (NULL != act) li_action_acquire(act);
	if (NULL != act_else) li_action_acquire(act_else);
	a = li_action_new_condition(val_cond->data.val_cond.cond, act, act_else);
	return a;
}

static liAction* core_set(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	liValue *val_val, *val_name;
	liAction *a;
	UNUSED(p); UNUSED(userdata);

	if (!val) {
		ERROR(srv, "%s", "need parameter");
		return NULL;
	}
	if (val->type != LI_VALUE_LIST) {
		ERROR(srv, "expected list, got %s", li_value_type_string(val->type));
		return NULL;
	}
	if (val->data.list->len != 2) {
		ERROR(srv, "expected list with length 2, has length %u", val->data.list->len);
		return NULL;
	}
	val_name = g_array_index(val->data.list, liValue*, 0);
	val_val = g_array_index(val->data.list, liValue*, 1);
	if (val_name->type != LI_VALUE_STRING) {
		ERROR(srv, "expected string as first parameter, got %s", li_value_type_string(val_name->type));
		return NULL;
	}
	a = li_option_action(srv, wrk, val_name->data.string->str, val_val);
	return a;
}

static gboolean core_setup_set(liServer *srv, liPlugin* p, liValue *val, gpointer userdata) {
	liValue *val_val, *val_name;
	UNUSED(p); UNUSED(userdata);

	if (!val) {
		ERROR(srv, "%s", "need parameter");
		return FALSE;
	}
	if (val->type != LI_VALUE_LIST) {
		ERROR(srv, "expected list, got %s", li_value_type_string(val->type));
		return FALSE;
	}
	if (val->data.list->len != 2) {
		ERROR(srv, "expected list with length 2, has length %u", val->data.list->len);
		return FALSE;
	}
	val_name = g_array_index(val->data.list, liValue*, 0);
	val_val = g_array_index(val->data.list, liValue*, 1);
	if (val_name->type != LI_VALUE_STRING) {
		ERROR(srv, "expected string as first parameter, got %s", li_value_type_string(val_name->type));
		return FALSE;
	}
	return li_plugin_set_default_option(srv, val_name->data.string->str, val_val);
}

static liHandlerResult core_handle_docroot(liVRequest *vr, gpointer param, gpointer *context) {
	UNUSED(context);

	g_string_truncate(vr->physical.doc_root, 0);
	g_string_append_len(vr->physical.doc_root, GSTR_LEN((GString*) param));

	if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
		VR_DEBUG(vr, "docroot: %s", vr->physical.doc_root->str);
	}

	/* build physical path: docroot + uri.path */
	g_string_truncate(vr->physical.path, 0);
	g_string_append_len(vr->physical.path, GSTR_LEN(vr->physical.doc_root));
	if (vr->request.uri.path->len == 0 || vr->request.uri.path->str[0] != '/')
		li_path_append_slash(vr->physical.path);
	g_string_append_len(vr->physical.path, GSTR_LEN(vr->request.uri.path));

	if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
		VR_DEBUG(vr, "physical path: %s", vr->physical.path->str);
	}

	return LI_HANDLER_GO_ON;
}

static void core_docroot_free(liServer *srv, gpointer param) {
	UNUSED(srv);
	g_string_free(param, TRUE);
}

static liAction* core_docroot(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	UNUSED(wrk); UNUSED(p); UNUSED(userdata);
	if (!val || val->type != LI_VALUE_STRING) {
		ERROR(srv, "%s", "docroot action expects a string parameter");
		return NULL;
	}

	return li_action_new_function(core_handle_docroot, NULL, core_docroot_free, li_value_extract_string(val));
}

typedef struct {
	GString *prefix, *path;
} core_alias_config;

static liHandlerResult core_handle_alias(liVRequest *vr, gpointer _param, gpointer *context) {
	GArray *param = _param;
	guint i;
	UNUSED(context);

	for (i = 0; i < param->len; i++) {
		core_alias_config ac = g_array_index(param, core_alias_config, i);
		gsize preflen = ac.prefix->len;
		gboolean isdir = FALSE;

		if (preflen > 0 && ac.prefix->str[preflen-1] == '/') {
			preflen--;
			isdir = TRUE;
		}

		if (li_string_prefix(vr->request.uri.path, ac.prefix->str, preflen)) {
			/* check if url has the form "prefix" or "prefix/.*" */
			if (isdir && vr->request.uri.path->str[preflen] != '\0' && vr->request.uri.path->str[preflen] != '/') continue;

			/* prefix matched */
			if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
				VR_DEBUG(vr, "alias path: %s", ac.path->str);
			}

			g_string_truncate(vr->physical.doc_root, 0);
			g_string_append_len(vr->physical.doc_root, GSTR_LEN(ac.path));

			/* build physical path: docroot + uri.path */
			g_string_truncate(vr->physical.path, 0);
			g_string_append_len(vr->physical.path, GSTR_LEN(ac.path));
			g_string_append_len(vr->physical.path, vr->request.uri.path->str + preflen, vr->request.uri.path->len - preflen);

			if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
				VR_DEBUG(vr, "alias physical path: %s", vr->physical.path->str);
			}

			return LI_HANDLER_GO_ON;
		}
	}

	return LI_HANDLER_GO_ON;
}

static void core_alias_free(liServer *srv, gpointer _param) {
	GArray *param = _param;
	guint i;
	UNUSED(srv);

	for (i = 0; i < param->len; i++) {
		core_alias_config ac = g_array_index(param, core_alias_config, i);
		g_string_free(ac.prefix, TRUE);
		g_string_free(ac.path, TRUE);
	}
	g_array_free(param, TRUE);
}

static liAction* core_alias(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	GArray *a = NULL;
	GArray *vl, *vl1;
	core_alias_config ac;
	UNUSED(wrk); UNUSED(p); UNUSED(userdata);

	if (!val || val->type != LI_VALUE_LIST) {
		ERROR(srv, "%s", "unexpected or no parameter for alias action");
		return NULL;
	}
	vl = val->data.list;
	if (vl->len == 2 && g_array_index(vl, liValue*, 0)->type == LI_VALUE_STRING && g_array_index(vl, liValue*, 1)->type == LI_VALUE_STRING) {
		a = g_array_sized_new(FALSE, TRUE, sizeof(core_alias_config), 1);
		ac.prefix = li_value_extract_string(g_array_index(vl, liValue*, 0));
		ac.path = li_value_extract_string(g_array_index(vl, liValue*, 1));
		g_array_append_val(a, ac);
	} else {
		guint i;
		a = g_array_sized_new(FALSE, TRUE, sizeof(core_alias_config), vl->len);
		for (i = 0; i < vl->len; i++) {
			if (g_array_index(vl, liValue*, i)->type != LI_VALUE_LIST) {
				ERROR(srv, "%s", "unexpected entry in parameter for alias action");
				goto error_free;
			}
			vl1 = g_array_index(vl, liValue*, i)->data.list;
			if (g_array_index(vl1, liValue*, 0)->type == LI_VALUE_STRING && g_array_index(vl1, liValue*, 1)->type == LI_VALUE_STRING) {
				ac.prefix = li_value_extract_string(g_array_index(vl1, liValue*, 0));
				ac.path = li_value_extract_string(g_array_index(vl1, liValue*, 1));
				g_array_append_val(a, ac);
			} else {
				ERROR(srv, "%s", "unexpected entry in parameter for alias action");
				goto error_free;
			}
		}
	}

	return li_action_new_function(core_handle_alias, NULL, core_alias_free, a);

error_free:
	core_alias_free(srv, a);
	return NULL;
}


static liHandlerResult core_handle_index(liVRequest *vr, gpointer param, gpointer *context) {
	liHandlerResult res;
	guint i;
	struct stat st;
	gint err;
	GString *file, *tmp_docroot, *tmp_path;
	GArray *files = param;

	UNUSED(context);

	if (!vr->physical.doc_root->len) {
		VR_ERROR(vr, "%s", "no docroot specified yet but index action called");
		return LI_HANDLER_ERROR;
	}

	res = li_stat_cache_get(vr, vr->physical.path, &st, &err, NULL);
	if (res == LI_HANDLER_WAIT_FOR_EVENT)
		return LI_HANDLER_WAIT_FOR_EVENT;

	if (res == LI_HANDLER_ERROR) {
		/* we ignore errors here so a later action can deal with it (e.g. 'static') */
		return LI_HANDLER_GO_ON;
	}

	if (!S_ISDIR(st.st_mode))
		return LI_HANDLER_GO_ON;

	/* need trailing slash */
	if (vr->request.uri.path->len == 0 || vr->request.uri.path->str[vr->request.uri.path->len-1] != '/') {
		li_vrequest_redirect_directory(vr);
		return LI_HANDLER_GO_ON;
	}

	/* we use two temporary strings here, one to append to docroot and one to append to physical path */
	tmp_docroot = vr->wrk->tmp_str;
	g_string_truncate(tmp_docroot, 0);
	g_string_append_len(vr->wrk->tmp_str, GSTR_LEN(vr->physical.doc_root));
	tmp_path = g_string_new_len(GSTR_LEN(vr->physical.path));

	/* loop through the list to find a possible index file */
	for (i = 0; i < files->len; i++) {
		file = g_array_index(files, liValue*, i)->data.string;

		if (file->str[0] == '/') {
			/* entries beginning with a slash shall be looked up directly at the docroot */
			g_string_truncate(tmp_docroot, vr->physical.doc_root->len);
			g_string_append_len(tmp_docroot, GSTR_LEN(file));
			res = li_stat_cache_get(vr, tmp_docroot, &st, &err, NULL);
		} else {
			g_string_truncate(tmp_path, vr->physical.path->len);
			g_string_append_len(tmp_path, GSTR_LEN(file));
			res = li_stat_cache_get(vr, tmp_path, &st, &err, NULL);
		}

		if (res == LI_HANDLER_WAIT_FOR_EVENT) {
			g_string_free(tmp_path, TRUE);
			return LI_HANDLER_WAIT_FOR_EVENT;
		}

		if (res == LI_HANDLER_GO_ON) {
			/* file exists. change physical path */
			if (file->str[0] == '/') {
				g_string_truncate(vr->physical.path, vr->physical.doc_root->len);
				g_string_truncate(vr->request.uri.path, 0);
			}

			g_string_append_len(vr->physical.path, GSTR_LEN(file));
			g_string_append_len(vr->request.uri.path, GSTR_LEN(file));

			if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
				VR_DEBUG(vr, "using index file: '%s'", file->str);
			}

			g_string_free(tmp_path, TRUE);

			return LI_HANDLER_GO_ON;
		}
	}

	g_string_free(tmp_path, TRUE);

	return LI_HANDLER_GO_ON;
}

static void core_index_free(liServer *srv, gpointer param) {
	guint i;
	GArray *files = param;

	UNUSED(srv);

	for (i = 0; i < files->len; i++) 
		li_value_free(g_array_index(files, liValue*, i));

	g_array_free(files, TRUE);
}

static liAction* core_index(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	GArray *files;
	guint i;

	UNUSED(wrk); UNUSED(p); UNUSED(userdata);

	if (!val || val->type != LI_VALUE_LIST) {
		ERROR(srv, "%s", "index action expects a list of strings as parameter");
		return NULL;
	}

	files = val->data.list;

	for (i = 0; i < files->len; i++) {
		if (g_array_index(files, liValue*, i)->type != LI_VALUE_STRING) {
			ERROR(srv, "%s", "index action expects a list of strings as parameter");
			return NULL;
		}
	}

	return li_action_new_function(core_handle_index, NULL, core_index_free, li_value_extract_list(val));
}


static liHandlerResult core_handle_static(liVRequest *vr, gpointer param, gpointer *context) {
	int fd = -1;
	struct stat st;
	int err;
	liHandlerResult res;
	GArray *exclude_arr = CORE_OPTIONPTR(LI_CORE_OPTION_STATIC_FILE_EXCLUDE_EXTENSIONS).list;
	static const gchar boundary[] = "fkj49sn38dcn3";

	UNUSED(param);
	UNUSED(context);

	if (li_vrequest_is_handled(vr))
		return LI_HANDLER_GO_ON;

	switch (vr->request.http_method) {
	case LI_HTTP_METHOD_GET:
	case LI_HTTP_METHOD_HEAD:
		break;
	default:
		if (!li_vrequest_handle_direct(vr)) {
			return LI_HANDLER_ERROR;
		}

		vr->response.http_status = 405;
		li_http_header_overwrite(vr->response.headers, CONST_STR_LEN("Allow"), CONST_STR_LEN("GET, HEAD"));
		return LI_HANDLER_GO_ON;
	}

	if (vr->physical.path->len == 0) return LI_HANDLER_GO_ON;

	if (exclude_arr) {
		const gchar *basep = g_basename(vr->physical.path->str);
		const GString base = li_const_gstring((gchar*) basep, vr->physical.path->len - (basep - vr->physical.path->str));
		guint i;

		for (i = 0; i < exclude_arr->len; i++) {
			liValue *v = g_array_index(exclude_arr, liValue*, i);
			if (li_string_suffix(&base, GSTR_LEN(v->data.string))) {
				if (!li_vrequest_handle_direct(vr)) {
					return LI_HANDLER_ERROR;
				}

				vr->response.http_status = 403;
				return LI_HANDLER_GO_ON;
			}
		}
	}

	res = li_stat_cache_get(vr, vr->physical.path, &st, &err, &fd);
	if (res == LI_HANDLER_WAIT_FOR_EVENT)
		return res;

	if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
		VR_DEBUG(vr, "try serving static file: '%s'", vr->physical.path->str);
	}

	if (res == LI_HANDLER_ERROR) {
		/* open or fstat failed */

		if (fd != -1)
			close(fd);

		if (!li_vrequest_handle_direct(vr)) {
			return LI_HANDLER_ERROR;
		}

		switch (err) {
		case ENOENT:
		case ENOTDIR:
			vr->response.http_status = 404;
			return LI_HANDLER_GO_ON;
		case EACCES:
			vr->response.http_status = 403;
			return LI_HANDLER_GO_ON;
		default:
			VR_ERROR(vr, "stat() or open() for '%s' failed: %s", vr->physical.path->str, g_strerror(err));
			return LI_HANDLER_ERROR;
		}
	} else if (S_ISDIR(st.st_mode)) {
		if (fd != -1)
			close(fd);
		return LI_HANDLER_GO_ON;
	} else if (!S_ISREG(st.st_mode)) {
		if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
			VR_DEBUG(vr, "not a regular file: '%s'", vr->physical.path->str);
		}
		
		if (fd != -1)
			close(fd);

		if (!li_vrequest_handle_direct(vr)) {
			return LI_HANDLER_ERROR;
		}
		vr->response.http_status = 403;
	} else {
		const GString *mime_str;
		gboolean cachable;
		gboolean ranged_response = FALSE;
		liHttpHeader *hh_range;
		liChunkFile *cf;
		static const GString default_mime_str = { CONST_STR_LEN("application/octet-stream"), 0 };

#ifdef FD_CLOEXEC
		fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif

		if (!li_vrequest_handle_direct(vr)) {
			close(fd);
			return LI_HANDLER_ERROR;
		}

		li_etag_set_header(vr, &st, &cachable);
		if (cachable) {
			vr->response.http_status = 304;
			close(fd);
			return LI_HANDLER_GO_ON;
		}

		cf = li_chunkfile_new(NULL, fd, FALSE);

		mime_str = li_mimetype_get(vr, vr->physical.path);
		if (!mime_str) mime_str = &default_mime_str;

		if (CORE_OPTION(LI_CORE_OPTION_STATIC_RANGE_REQUESTS).boolean) {
			li_http_header_overwrite(vr->response.headers, CONST_STR_LEN("Accept-Ranges"), CONST_STR_LEN("bytes"));

			hh_range = li_http_header_lookup(vr->request.headers, CONST_STR_LEN("range"));
			if (hh_range) {
				/* TODO: Check If-Range: header */
				const GString range_str = li_const_gstring(LI_HEADER_VALUE_LEN(hh_range));
				liParseHttpRangeState rs;
				gboolean is_multipart = FALSE, done = FALSE;

				li_parse_http_range_init(&rs, &range_str, st.st_size);
				do {
					switch (li_parse_http_range_next(&rs)) {
					case LI_PARSE_HTTP_RANGE_OK:
						if (!is_multipart && !rs.last_range) {
							is_multipart = TRUE;
						}
						g_string_printf(vr->wrk->tmp_str, "bytes %"G_GINT64_FORMAT"-%"G_GINT64_FORMAT"/%"G_GINT64_FORMAT, rs.range_start, rs.range_end, (goffset) st.st_size);
						if (is_multipart) {
							GString *subheader = g_string_sized_new(1023);
							g_string_append_printf(subheader, "\r\n--%s\r\nContent-Type: %s\r\nContent-Range: %s\r\n\r\n", boundary, mime_str->str, vr->wrk->tmp_str->str);
							li_chunkqueue_append_string(vr->out, subheader);
							li_chunkqueue_append_chunkfile(vr->out, cf, rs.range_start, rs.range_length);
						} else {
							li_http_header_overwrite(vr->response.headers, CONST_STR_LEN("Content-Range"), GSTR_LEN(vr->wrk->tmp_str));
							li_chunkqueue_append_chunkfile(vr->out, cf, rs.range_start, rs.range_length);
						}
						break;
					case LI_PARSE_HTTP_RANGE_DONE:
						ranged_response = TRUE;
						done = TRUE;
						vr->response.http_status = 206;
						if (is_multipart) {
							GString *subheader = g_string_sized_new(1023);
							g_string_append_printf(subheader, "\r\n--%s--\r\n", boundary);
							li_chunkqueue_append_string(vr->out, subheader);

							g_string_printf(vr->wrk->tmp_str, "multipart/byteranges; boundary=%s", boundary);
							li_http_header_overwrite(vr->response.headers, CONST_STR_LEN("Content-Type"), GSTR_LEN(vr->wrk->tmp_str));
						} else {
							li_http_header_overwrite(vr->response.headers, CONST_STR_LEN("Content-Type"), GSTR_LEN(mime_str));
						}
						break;
					case LI_PARSE_HTTP_RANGE_INVALID:
						done = TRUE;
						li_chunkqueue_reset(vr->out);
						break;
					case LI_PARSE_HTTP_RANGE_NOT_SATISFIABLE:
						ranged_response = TRUE;
						done = TRUE;
						li_chunkqueue_reset(vr->out); vr->out->is_closed = TRUE;
						g_string_printf(vr->wrk->tmp_str, "bytes */%"G_GINT64_FORMAT, (goffset) st.st_size);
						li_http_header_overwrite(vr->response.headers, CONST_STR_LEN("Content-Range"), GSTR_LEN(vr->wrk->tmp_str));
						vr->response.http_status = 416;
						break;
					}
				} while (!done);
				li_parse_http_range_clear(&rs);
			}
		}

		if (!ranged_response) {
			vr->response.http_status = 200;
			li_http_header_overwrite(vr->response.headers, CONST_STR_LEN("Content-Type"), GSTR_LEN(mime_str));
			li_chunkqueue_append_chunkfile(vr->out, cf, 0, st.st_size);
		}

		li_chunkfile_release(cf);
	}

	return LI_HANDLER_GO_ON;
}

static liAction* core_static(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	UNUSED(wrk); UNUSED(p); UNUSED(userdata);
	if (val) {
		ERROR(srv, "%s", "static action doesn't have parameters");
		return NULL;
	}

	return li_action_new_function(core_handle_static, NULL, NULL, NULL);
}


static liHandlerResult core_handle_pathinfo(liVRequest *vr, gpointer param, gpointer *context) {
	struct stat st;
	int err;
	liHandlerResult res;
	gchar *slash;
	UNUSED(param);
	UNUSED(context);

	if (li_vrequest_is_handled(vr)) return LI_HANDLER_GO_ON;

next_round:
	if (vr->physical.path->len <= vr->physical.doc_root->len) return LI_HANDLER_GO_ON;

	if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
		VR_DEBUG(vr, "stat: physical path: %s", vr->physical.path->str);
	}
	res = li_stat_cache_get(vr, vr->physical.path, &st, &err, NULL);
	if (res == LI_HANDLER_GO_ON) {
		if (vr->physical.pathinfo->len > 0) {
			/* remove PATHINFO from url too ("SCRIPT_NAME") */
			if (li_string_suffix(vr->request.uri.path, GSTR_LEN(vr->physical.pathinfo))) {
				g_string_set_size(vr->request.uri.path, vr->request.uri.path->len - vr->physical.pathinfo->len);
			}
		}
	}
	if (res == LI_HANDLER_WAIT_FOR_EVENT || res == LI_HANDLER_GO_ON)
		return res;

	/* stat failed. why? */
	if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
		VR_DEBUG(vr, "stat failed %i: physical path: %s", err, vr->physical.path->str);
	}
	switch (err) {
	case ENOTDIR:
		slash = strrchr(vr->physical.path->str, '/');
		if (!slash) {
			if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
				VR_DEBUG(vr, "no slash: %s", vr->physical.path->str);
			}
			return LI_HANDLER_GO_ON;
		}
		g_string_prepend(vr->physical.pathinfo, slash);
		g_string_set_size(vr->physical.path, slash - vr->physical.path->str);
		if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
			VR_DEBUG(vr, "physical path: %s", vr->physical.path->str);
		}
		goto next_round;
	case ENOENT:
		return LI_HANDLER_GO_ON;
	case EACCES:
		return LI_HANDLER_GO_ON;
	default:
		VR_ERROR(vr, "stat() or open() for '%s' failed: %s", vr->physical.path->str, g_strerror(err));
		return LI_HANDLER_ERROR;
	}

	return LI_HANDLER_GO_ON;
}

static liAction* core_pathinfo(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	UNUSED(wrk); UNUSED(p); UNUSED(userdata);
	if (val) {
		ERROR(srv, "%s", "pathinfo action doesn't have parameters");
		return NULL;
	}

	return li_action_new_function(core_handle_pathinfo, NULL, NULL, NULL);
}

static liHandlerResult core_handle_status(liVRequest *vr, gpointer param, gpointer *context) {
	UNUSED(param);
	UNUSED(context);

	vr->response.http_status = GPOINTER_TO_INT(param);

	return LI_HANDLER_GO_ON;
}

static liAction* core_status(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	gpointer ptr;

	UNUSED(wrk); UNUSED(p); UNUSED(userdata);

	if (!val || val->type != LI_VALUE_NUMBER) {
		ERROR(srv, "%s", "set_status action expects a number as parameter");
		return NULL;
	}

	ptr = GINT_TO_POINTER((gint) val->data.number);

	return li_action_new_function(core_handle_status, NULL, NULL, ptr);
}


static void core_log_write_free(liServer *srv, gpointer param) {
	UNUSED(srv);
	g_string_free(param, TRUE);
}

static liHandlerResult core_handle_log_write(liVRequest *vr, gpointer param, gpointer *context) {
	GString *msg = param;

	UNUSED(context);

	VR_INFO(vr, "%s", msg->str);

	return LI_HANDLER_GO_ON;
}

static liAction* core_log_write(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	UNUSED(wrk); UNUSED(p); UNUSED(userdata);
	if (!val || val->type != LI_VALUE_STRING) {
		ERROR(srv, "%s", "log.write expects a string parameter");
		return NULL;
	}

	return li_action_new_function(core_handle_log_write, NULL, core_log_write_free, li_value_extract_string(val));
}


static liHandlerResult core_handle_blank(liVRequest *vr, gpointer param, gpointer *context) {
	UNUSED(param);
	UNUSED(context);

	if (!li_vrequest_handle_direct(vr)) return LI_HANDLER_GO_ON;

	vr->response.http_status = 200;

	return LI_HANDLER_GO_ON;
}

static liAction* core_blank(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
	UNUSED(wrk); UNUSED(p); UNUSED(userdata);

	if (val) {
		ERROR(srv, "%s", "'blank' action doesn't have parameters");
		return NULL;
	}

	return li_action_new_function(core_handle_blank, NULL, NULL, NULL);
}


static gboolean core_listen(liServer *srv, liPlugin* p, liValue *val, gpointer userdata) {
	GString *ipstr;
	UNUSED(p); UNUSED(userdata);

	if (val->type != LI_VALUE_STRING) {
		ERROR(srv, "%s", "listen expects a string as parameter");
		return FALSE;
	}

	ipstr = val->data.string;
	li_angel_listen(srv, ipstr, NULL, NULL);

	return TRUE;
}


static gboolean core_workers(liServer *srv, liPlugin* p, liValue *val, gpointer userdata) {
	gint workers;
	UNUSED(p); UNUSED(userdata);

	workers = val->data.number;
	if (val->type != LI_VALUE_NUMBER || workers < 1) {
		ERROR(srv, "%s", "workers expects a positive integer as parameter");
		return FALSE;
	}

	if (srv->worker_count != 0) {
		ERROR(srv, "workers already called with '%i', overwriting", srv->worker_count);
	}
	srv->worker_count = workers;
	return TRUE;
}

static gboolean core_module_load(liServer *srv, liPlugin* p, liValue *val, gpointer userdata) {
	liValue *mods = li_value_new_list();

	UNUSED(p); UNUSED(userdata);

	if (!g_module_supported()) {
		ERROR(srv, "%s", "module loading not supported on this platform");
		li_value_free(mods);
		return FALSE;
	}

	if (val->type == LI_VALUE_STRING) {
		/* load only one module */